package top.shiyiri.community.controller;

import org.apache.commons.lang3.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.multipart.MultipartFile;
import top.shiyiri.community.annotation.LoginRequired;
import top.shiyiri.community.bean.User;
import top.shiyiri.community.service.FollowService;
import top.shiyiri.community.service.LikeService;
import top.shiyiri.community.service.UserService;
import top.shiyiri.community.util.CommunityConstant;
import top.shiyiri.community.util.CommunityUtil;
import top.shiyiri.community.util.HostHolder;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.util.Objects;

/**
 * @author Aunean
 * @date 2022/3/14 20:58
 */
@Controller
@RequestMapping("/user")
public class UserController implements CommunityConstant {
    private static final Logger LOGGER = LoggerFactory.getLogger(UserController.class);

    @Value("${community.path.upload}")
    private String uploadPath;

    @Value("${community.path.domain}")
    private String domain;

    @Value("${server.servlet.context-path}")
    private String contextPath;

    @Autowired
    private UserService userService;

    @Autowired
    private HostHolder hostHolder;

    @Autowired
    private LikeService likeService;

    @Autowired
    private FollowService followService;

    @LoginRequired
    @GetMapping("/setting")
    public String getSettingPage() {
        return "site/setting";
    }

    @LoginRequired
    @PostMapping("/upload")
    public String uploadHeader(MultipartFile headerImg, Model model) {
        if (headerImg == null) {
            model.addAttribute("error", "您还没有选择图片！");
            return "site/setting";
        }
        String filename = headerImg.getOriginalFilename();
        String suffix = filename.substring(filename.lastIndexOf("."));
        if (StringUtils.isBlank(suffix)) {
            model.addAttribute("error", "文件的格式不正确！");
            return "site/setting";
        }
        //生成随机的文件名
        filename = CommunityUtil.generateUUID() + suffix;
        //确定文件存放的路径
        File dest = new File(uploadPath + "/" + filename);
        try {
            //存储文件
            headerImg.transferTo(dest);
        } catch (IOException e) {
            LOGGER.error("上传文件失败：" + e.getMessage());
            throw new RuntimeException("上传文件失败，服务器发生异常！", e);
        }

        //更新当前用户的头像路径
        // http://localhost:8080/community/user/header/xxx.png
        User user = hostHolder.getUser();
        String headerUrl = domain + contextPath + "/user/header/" + filename;
        userService.updateHeader(user.getId(), headerUrl);

        return "redirect:/index";
    }

    @GetMapping("/header/{filename}")
    public void getHeader(@PathVariable("filename") String filename,
                          HttpServletResponse response) {
        //服务器存放路径
        filename = uploadPath + "/" + filename;
        //文件后缀
        String suffix = filename.substring(filename.lastIndexOf(".")+1);
        //响应图片
        response.setContentType("image/" + suffix);
        try(FileInputStream fis = new FileInputStream(filename);
            ServletOutputStream os = response.getOutputStream();) {

            byte[] buffer = new byte[1024];
            int b = 0;
            while ((b = fis.read(buffer)) != -1) {
                os.write(buffer, 0, b);
            }
        } catch (IOException e) {
            LOGGER.error("读取头像失败：" + e.getMessage());
        }
    }

    @LoginRequired
    @PostMapping("/updatePassword")
    public String updatePassword(String password, String newPassword1, String newPassword2, Model model) {
        User user = hostHolder.getUser();
        if (!Objects.equals(CommunityUtil.md5(password + user.getSalt()), user.getPassword())) {
            model.addAttribute("passwordMsg", "原始密码输出错误！");
            return "site/setting";
        }

        if (StringUtils.isBlank(newPassword1)) {
            model.addAttribute("newPasswordMsg2", "密码不能为空！");
            return "site/setting";
        }

        if (!newPassword1.equals(newPassword2)) {
            model.addAttribute("newPasswordMsg", "两次输入的密码不一致！");
            return "site/setting";
        }

        password = CommunityUtil.md5(newPassword2 + user.getSalt());
        userService.updatePassword(user.getId(), password);
        return "redirect:/logout";
    }

    //个人主页
    @GetMapping("/profile/{userId}")
    public String profile(@PathVariable("userId") Integer userId, Model model) {
        User user = userService.findUserById(userId);
        if (user == null) {
            throw new RuntimeException("该用户不存在");
        }
        //用户
        model.addAttribute("user", user);
        //点赞数量
        int likeCount = likeService.findUserLikeCount(userId);
        model.addAttribute("likeCount", likeCount);
        //关注数量
        long followeeCount = followService.findFolloweeCount(userId, ENTITY_TYPE_USER);
        model.addAttribute("followeeCount", followeeCount);
        //粉丝数量
        long followerCount = followService.findFollowerCount(ENTITY_TYPE_USER, userId);
        model.addAttribute("followerCount", followerCount);
        //是否已关注
        boolean hasFollowed = false;
        if (hostHolder.getUser() != null) {
            hasFollowed = followService.hasFollowed(hostHolder.getUser().getId(), ENTITY_TYPE_USER, userId);
        }
        model.addAttribute("hasFollowed", hasFollowed);

        return "site/profile";
    }

}
